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'tiuited Queries HAMPTON'W. EVANs, or PHILADELPHIA, PENNSYLVANIA.

Lettersl-atent No. 102,522, dated May 3, 1870.

SECTIONAL STEAM-GENERAIR.

,l'he Schedule'revfcrred to in these Letters Patent and making part of che same I, HAMPTON W. EVANS, of the city of Philadelphia, in the State of Pennsylvania, have invented certain Improvements in Steam-Generators, of which the following is a specification.

The nature of my invention consists of a series of hollowdisks, which, are bolted together, and are vertically arranged, and have water and steam-commu- -nication with each other, the lower edges of all the sections, with the exception of the rear one, being curved, so as to come above and around the fire, and thinned so as to form spaces when the sections are together to within ka few inches of the outer edges of the sections, for the passage of a considerable portion ofthe products of combustion which escape into the chimney, through ues which run through the sections, as hereinafter described. Thus the heat is caused to act upon the greater portion of the broad faces of the sections, and additional heating-surface is given to the interior of the generator by means of the fines 'above-mentioned.

The invention further consists of conical hollow bosses, which project from one side ofthe sections through the metal of 'the contiguous sections, the openings through the bosses being ofsuicient ysize to form spaces around confining screw-bolts, for the passage of steam and water from one section to another.

. The joints around said conical bosses and grooves near the outer edges of the sections are filled' with cement before the sections are bolted together, to form tight joints. j

To enable others skilled in the art to which my improvernent appertains to apply the same to practice, I will now give a detailed description thereof.

In the accompanying drawings which make a part of. this specification- Figure l is a plan of the improved generator.

Figure 2 is a face v-iew of the section A.

Figure 3 is an inside view of the section A, with the cap-plate B removed therefrom.

Figure 4 is a vertical section of the generator.

Like letters in all the figures indicate the same parts.

In the drawings I have represented three sections, A A' A, they latter having a cap-plate, B. These are 4 all fastened together to form the generator by means of the screw-bolts C 0 C, as seen inv figs. 1 and 4. It will be readily seen, however, that any number ofA sections may be used in adaptation to the requisite capacity of the generator. -1 .Y

The said sections 'rest upon the fire-box D, as4 seen iu g. 4, all but the rear one, A, being curved out above the grate E, in the manner clearly seen in g. i

3, which is an interior face view of the section A, thecap B being removed.

The sections are thinner at their lower edges, so as to forr'n spaces ct for the passage of products of combustion, whereby to act upon the large flat surfaces of the sections, there being flues b through the sections, as seen in figs. 2 and 4, which form draughts. to the chimney and give additional `heatingsurface in the interior of the sections.

Ou the interior surfaces of the sections there areL strengthening-ribs c, which may be few in number in generators of small size.

At the points through which the screw-bolts C C C n are grooves g, for the reception of cement.

The balls .F F and F', against the cap-plate B, through which the said bolts C pass, have conical pro jections c', similar to the bosses e, which project through the cap-plate in openings f', in which cement is also placed. Then, when the'nuts h are screwed down on the bolts C, all the joints between the sec tions are made. perfectly tight.

The opening through the bosses c and ball projections c' are of such size as to form water and steampassages around the boltsG. f

The steam-passages are seen at t' i i.

The openings in the balls F Fand F are continued to one side thereof', as seen in figs; l and 4, and the feed-pipe is connected withohe of the balls F, the blow-oif cock with the other, and the steam-pipe with the hall F'.

Whatl claim as my invention, and desire to secule by Letters Patent, is+ l l. The combination of the sections A A' A", constl-noted substantialy as described, having heat-iiues b through them and spaces a between them, and ar.- rauged in relation to the fire-box hereinbefore described.

2. The conical bosses e on the sections A A', and

the Vconical projections e on the balls F F and F', in`

combination with the openings f and f substantially as described.

In testimony that the above is my invention, I have hereunto set my hand and. affixed my seal this 24th 'day of September, 1869.

HAMPTON w. EVANS. [1.. s]

Witnesses:

SEEPHEN UsTIcK, JOHN WmTE.

lD and grate E, as. 

